package com.swagger.utils;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;

import java.io.IOException;
import java.util.List;

public class JsonUtils {

	private static ObjectMapper objectMapper = new ObjectMapper();

	static {
		objectMapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
		objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
		objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
		objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
		objectMapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
	}

	public static <T> T readValue(String jsonStr, Class<T> clazz) throws IOException {
		return objectMapper.readValue(jsonStr, clazz);
	}

	public static <T> List<T> readListValue(String jsonStr, Class<T> clazz) throws IOException {
		JavaType javaType = objectMapper.getTypeFactory().constructParametricType(List.class, clazz);
		return objectMapper.readValue(jsonStr, javaType);
	}

	public static ArrayNode readArray(String jsonStr) throws IOException {
		JsonNode node = objectMapper.readTree(jsonStr);
		if (node.isArray()) {
			return (ArrayNode) node;
		}
		return null;
	}

	public static JsonNode readNode(String jsonStr) throws IOException {
		return objectMapper.readTree(jsonStr);
	}

	public static String writeJsonStr(Object obj) throws JsonProcessingException {
		return objectMapper.writeValueAsString(obj);
	}

	public static ObjectNode createObjectNode() {
		return objectMapper.createObjectNode();
	}

	public static ArrayNode createArrayNode() {
		return objectMapper.createArrayNode();
	}

}
